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18mm Galvanised Rope Thimble Eye Marine Rigging Lalizas 99388 Protection
18mm Galvanised Rope Thimble Eye Marine Rigging Lalizas 99388 Protection
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Mercruiser Exhaust Gasket 27-99386
Premium High-Performance Marine Component
This precision-engineered exhaust gasket is designed specifically for Mercruiser High Performance sterndrive applications. Primarily utilized in large displacement Big Block engines, this gasket ensures a reliable, heat-resistant seal between the exhaust elbow and the manifold or exhaust pipe. It is a critical component for maintaining engine backpressure and preventing exhaust leaks in high-horsepower marine environments.
Key Features
- ✔ Direct OEM replacement for GIL systems
- ✔ High-temperature composite material
- ✔ Precise fit for 420HP - 600HP engines
- ✔ Engineered for Big Block (454/502) race setups
Technical Specs
| Part Type: | Exhaust Elbow Gasket |
| Engine Type: | Big Block GM V8 |
| Compatibility: | GIL Exhaust Systems |
| Material: | High-Grade Composite |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Mercruiser HP | 420hp, 450hp, 500hp, 525hp, 600hp | Big Block V8 Applications |
| Mercruiser Cyclone | 370-460 TRS Models (1978-1986) | High Performance Range |
| GIL Exhaust | Various Stainless & Performance Setups | Check original gasket profile |
OEM Cross Reference
| Mercury / Quicksilver | 27-99386 1, 27-99386, 27-993861 |
| Superseded By | 27-848147 |
| Offshore Marine | 69147 |
Questions & Answers
Is this a genuine original part?
This is a premium quality replacement part manufactured to meet or exceed original equipment (OE) standards for high-performance marine exhaust systems.
How do I know if it is compatible?
We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, particularly 27-99386 1 or 27-848147, it is the correct fit.
How many gaskets do I need for my engine?
For standard Mercruiser high-performance setups, 2 gaskets are typically required per engine. However, models utilizing a diffuser plate may require up to 4 gaskets per engine. Please check your specific exhaust assembly requirements.
Note: Please verify your original part number against the references above before purchasing. This part is intended for high-performance engines and may not fit standard Alpha One or Bravo exhaust manifolds.
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